LinguaLab.net Jul 15, 2009:

boss v søppel Boss is often used for rubbish indoors, often referring to the rubbish bin, whereas søppel is more general.

valund Jul 14, 2009:

Yes, quite simply 'landfill'. 'Boss' is not as good as 'søppel', since it (to my ears) sounds a little time/dialect-specific. 'Søppelfylling' is more usual.

Boss/båss originally meant something like waste deriving from hay and straw, but it seems to have lost all of those connotations today.